Long Range Weather Forecast - May 2013 Update
Firstly, apologies for the long delay since the previous update, we have had some technical problems within the system but these are now resolved.
This forecast covers the remainder of May and the first part of Summer, but is not the final or full summer forecast which will be issued later this month.
May
After a pleasant and warm bank holiday (for many) at the start of May, the weather has steadily changed back to cooler and wetter conditions since, and the indications are that the general theme will continue during the remainder of the month - this doesn't rule out some warmer, drier periods though with temperatures overall close to average.
May Temperature

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June
Into Summer, and the rainfall pattern is currently expected to be close to normal, but with some local variations meaning some parts could see a wetter than average month. Temperatures are forecast to be close to or above average, with the northern half of the UK perhaps seeing the largest departure from average levels.
June Temperature

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June Rainfall

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July
Confidence is low at this stage, but indications are that July could be a wetter month with many regions forecast to be wetter, or even much wetter than average albeit with some significant local variation again likely. Temperatures are generally close to or above average.
July Temperature

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July Rainfall

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The long range weather forecast displayed on this page is based on data from the Climate Forecast System from the NCEP (USA), run out to 9 months in advance and are updated once a month. The raw data is sent daily to Netweather, our systems then average and further process that data to produce the forecast you see below. The average figures you see on the forecast are not the standard 1971 to 2000 figures you may often see, instead they are rolling averages, currently from the period 1980-2008.